Pressure-regulator.



J. L. GREVELING. PRESSURE REGULATOR.

APPLICATION 1-11.21) APR. 1, 1908.

1,045,375, Patented Nov. 26, 1912.,

7 1 a 7 F 6 I'7.JL 9

JOHN L. cnEvnLrNe, or nnw YoaK, n. Y.,

ASSIGNOR TO THE SAFETY CAR HEATING-- & LIGHTING COMPANY, A CORPORATIONOF NEW JERSEY.

PRESSURE-REGULATOR.

noaae'rs.

Specification of Letters Patent.

Patented Nov. 26, 1912.

v. App1ieation filed April 1, 1908. Serial No. 424,673.

plete specification, reference being had to the accompanying drawings.

My invention pertains to that class of devices known as pressureregulators, usually adapted to be used in connection with a source offluid under pressure and intended to regulate the flow of the said fluidin such manner as to produce a substantially constant outlet pressureregardless of the pressure upon the inlet, within reasonable limits.

My invention has for its particular object to produce a regulator whichunder fixed conditions will deliver a substantially constant pressurefrom its outlet regardless of the inlet pressure within the limits ofits design, and upon changes in temperature correspondingly changetheoutlet pressure in such manner as may be desired and predetermined.

In the drawing, Figure I represents a sectional View of one form ofregulator embodying my invention. Fig. II represents a partial sectionof a regulator embodying my invention in a modified form.

Like numbers in both figures are used to indicate corresponding parts.

Referring 'to Fig. I, (1) indicates a body or'shell-portion of aregulator which in its general construction might be said'to be of thewell known Pintsch type, and having a pressure inlet connection asindicated by (2) through which the flow of gas is governed as by valve(3).

(4) is a lever ivoted at (5) and operating the valve 3) by itscommunication through the adjusting screw (6). The lever (4) is providedwith the hinge (7) carrying the lever (8) while (9) is a compresslonspring tending to press levers (4) and (8) together in the positionshown in the drawing through the inst-rumentality of screw- (10), andadjusting nut (11).

(12) represents'a section of what 1s technically known as an expansiondisk such as also permit the adjustment of the same.

disk (12) and engage the levers (4) and (8) in such manner that whenpressed apart as by expansion of the fluid within the disk they separatethe levers (4) and 8) against the action of spring (9). The levers (4)and 8) are notched in a manner similar to a scale beam as indicated at(14), and these notches engaging the members (13) hold the expanslondisk properly in place and (15) is a leaf spring normally tending topull down the lever (4) in such manner as to cause the valve (3) toopen.

The lever (8) is provided at its outer end with the hinge (l6) engagingthe-link (17 to which are attached the members (18) carryingdiaphragm(19) which is held in place so as to make a gas tight joint as by anannular ring (20). The hinge (16) also carries the depending member (21)which passes through the body of the regulator as through aperture (22)and a downward pressure is exerted upon the hinge (16) by a compressionspring while adjustment of such pressuremay be accomplished byadjustment of nut (24). The cap (25) prevents escape of fluid from theinterior of the regulator to the atmosphere.

(26) indicates the usual outlet from which uniform pressure isto be had.

In Fig. II. the expansion disk (12) is shown external to the regulatorand the ring (20) is shown as provided with a hinge (26) carrying alever (27) which is provided with a slotted portion (28) one face ofwhich is notched as indicated at (29). This face bears against a notchednut (30) carrying screw (31) which is attached to member (32) in such amanner that it may revolve therein without rotating the disk (12). A fin(33) engages the member (37) attached to the opposite side of the disk12). A heavy leaf spring (34) is attached to the lever (27) as bymeans'of screw (35) in such manner as normally to press upon top of themember 18) as indicated at (36).

The operation of my improved regulator is substantially as follows:Referring particularly to Fig. I., it will be obvious that if there beno back pressure in the interior of the chamber (1) the diaphragm (19)will fall and the end (16-) of the lever (8) will drop to a lowerposition than indicated in the drawing. It will also be obvious thatsuch movement will cause the valve to open. Now if a source of fluidunder pressure be connected with the inlet (2) the fluid will flowthrough valve mechanism (3) into the chamber formed by (l) and diaphragm(19), and if the outlet be so constricted as to cause back pressure thelever, (8) will be raised against the action of the spring (23). Raisingthe lever (8) i will also raise the lever (4) and thus crowd .manner asto cut down mcommg fluid and thus prevent an increase of the pressurethe valve (3) against its seat in such a such manner that the increasewill cause the expansion disk (12) to expand and separate the outer endsof the levers (4) and '(8) against the action of the spring '(9) thiswill cause the valve (3) to open wider which in turn will require thelever (8) to be lifted to a higher position to close the valve and thusnecessitate a further com-- pression of the spring (23) and a higherpressure within the regulator corresponding to the increase intemperature above mentioned. So long as the temperature remains constantthe levers (4) and (8) will serve the purpose of a simple lever, butupon changes in temperature the above outlined action or the reversethereof will take place. If, however, the temperature falls and themember (12) contracts while the pressure within the regulator is thatcaused by a higher temperature the diaphragm (19) will not be forceddownwardly against the higher pressure and thus cause the extra force tobe exerted upon valve (3 but the spring (9) will allow the levers (4 and(8) to remain separated until a portion of the gas is used from theinterior of the regulator and the pressure brought down to the properpressure to correspond with the temperature at that time, when therelative relations between the twolevers will be as determined by thedisk (12) and spring (9). It is obvious that the position of the members(13) along the levers (4) and (8) will determine within limits theamount of compression given to spring (23) for various degrees ofexpansion of the member (12) owing to the change of leverage.

In "the regulator shown in Fig. II. movements of the diaphragm (19) willperform the functions in regulation as described above and it is obviousthat the greater pressure exerted upon thetop of the diaspring (34) toincrease the downward pressure upon the to of the diaphragm (19) alsothat the variation of such pressure by disk (12) may be adjusted withincertain limits by changing the relative vertical position of the saiddisk and by changing the adjustment of screw (31) in a well knownmanner.

I do not wish in any way to limit myself to the specific construction ordetail shown in the accompanying drawings, which merely show certainforms of apparatus embodying my invention, Itv is plain that widevariations may be made in the details ofconstruction without departingfrom the spirit of my invention as is set forth in the following claims.

I claim:

1. In combination, in a fluid pressure regulator having a valvegoverning the passage of fluid therethrough; means for maintainin apredetermined ressure on the outlet sic of said valve t roughout changesin the pressure on the inlet side of said. valve; and means, forautomatically determinin the outlet pressure to be maintained dependentupon changes in temperature, comprising a thermal expansion member, andyielding means operatively connecting the same with said valve.

2. In a fluid pressure regulator having an inlet portion and an outletportion; means for automatically maintaining the outlet pressuresubstantially constant throughout changes of pressure in the inletportion; and means,.for automatically causing the outlet pressure to bemaintained to vary upon changes in temperature, comprising athermalexpansion member and mechanical means operatively connecting saidexpansion member with the first mentioned means.

3. In a fluid pressure regulator, means for maintaining a predeterminedoutlet pressure throughout changes in the inlet-pressure; combined withmeans, for automatically governing the outlet' pressure to bemaintained, depending upon changes in temperature of the fluid governedby said regulator, comprising an expansion member in operative relationto said fluid; and means whereby the expansion of said member acts tovary the pressure to be maintained.

4. In a pressure regulator, the combination with a valve, the osition ofwhich determines the pressure elivered by the said regulator; meanswhereby the pressure delivered operates said valve; and yielding meansaffecting the'operation of said valve and directly affected bytemperature changes, whereby changes in temperature of the fluiddelivered alter the operation 01 said valve.

5. In a fluid pressure regulator, a movable phragm; means whereby theposition of said diaphragm governs the resistance, caused by saidregulator, to the flow of fluid therethrough; and means whereby changes1n temperature affect the position of said diaphragm with reference tosaid valve.

6; A pressure regulator comprehending a valve governing the flow offluid there through; means for operating valve to cause the same todeliver a substantially constant outlet pressure, comprising a movablediaphragm exposed to the outlet pressure; yielding means tending to movethe same in a direction opposed. to the outlet pres-' sure; and athermal expansion member operatively connected with ,said yieldingmeans, whereby expansion of said member varies the yielding means tovary the out let pressure.

JOHN L. CREVELING.

